Coating machine



L. B CASE COATING MACHINE Aug. 23, 1932.

Filed July 26, 1930 Patented Aug. 23, 1932 PATENT OFFICE LYNN B. CASE, OF NEW BRUNSWICK, NEW JERSEY, ASSIGNOR TO JOHN WALDON COB- PORATION, OF NEW BRUNSWICK, NEW JERSEY, A CORPORATION OF NEW JERSEY COATING MACHINE Application filed July 26,

This invention relates to improvements in coating machines, and more particularly to machines intended for use in applying bakelite or similar coatings.

An important object of the invention is the provision in apparatus of this character of a construction permitting the production of a coated article wherein the coating is smooth;

1y finished.

1 A further and more specific object of the invention is the provision in a machine of this character of a means for removing from the coating as applied by the ordinary coating rolls the small ridges and imperfections which are always present in coatings applied by such rolls.

A still further object of the invention is to provide a doctor roll mechanism for use with coating machines to smooth the coatings applied thereby.

These and other objects I attain by the construction shown in the accompanying drawing wherein, for the purpose of illustration, I have shown a preferred embodiment of my invention and wherein:

Fig. 1 is a side elevation of a coating machine embodying a doctor roll constructed in accordance with my invention;

Fig. 2 is a fragmentary perspective view of the doctor roll; and

Fig. 3 is a plan view of the trough. Referring now more particularly to the drawing, the numeral 10 generally designates the frame of a coating machine supporting in bearings 11 and 12 rolls 13 and 14 which are employed in gauging the thickness of the coating remaining on the material being coated after its passage through the coating tank 15.

In accordance with my invention I mount upon the frame of the machine a air of rolls 16 carried by a suitable bracket 1 which also mounts a doctor roll 18. The doctor roll 18 is mounted in bearings 19 adjustable toward and away from the general plane of the faces of rolls 16 with which the coated material contacts. Roll 18 through chain and sprocket gearing 20 connecting the same with the roll 14, or through any other suitable driving medium, is driven at a speed 1930. Serial No. 471,022.

such that its surface speed is approximately five per cent of the s eed of the material which is being coated. The bearings 19 through brackets 21 support a trough 22 having in the bottom thereof an opening for the passage of a wick 23 which contacts with the surface of roll 18. Trou h 22 receives a solvent for the coating w ich is being applied and through the wick transmits this solvent to the surface of the roll 18. Since the surface speed of the roll is very low with respect to the treated material, the solvent acts upon the coating first to soften the same so that the smoothing action of the roll may remove any imperfections or roughnesses occurring therein. The solvent additionally serves to keep the surface of the roll clear.

Since the construction employed is obviously capable of a considerable range of change and modification without departing from the spirit of the invention, I do not wish to be understood as limiting myself to the particular structure herein illustrated except as hereinafter claimed.

I claim:

1. In coating apparatus, means for feeding a web to be coated and for applying a coating thereto, means for removing roughnesses from the coating com rising a doctor roll engaging the coated web, means driving said roll at a much lower surface speed than the speed of the web, and means for moistening the1 roll with a solvent of the coating mater1a 2. In coating apparatus, means for feeding a web to be coated and for applying a coating thereto, means for removing roughnesses from the coating comprising a doctor roll engaging the coated web, means driving said roll at a much lower surface speed than the speed of the web, a wick extending longitudinally of said roll and bearing thereagainst, and means for supplying a solvent ofthe coating to said wick. I

3. In coating apparatus, means for feeding a web to be coated and for applying a coating thereto, means for removing roughnesses from the coating comprising a doctor roll engaging the coated web, means driv- 5 aperture in its bottom, and a wick extendmg through said aperture and at its outer end engaging the roll.

4. In coatin apparatus, means for feeding a web to o coated and for applying a 1 coating thereto, and means for removing roughnesses from the coating comprising a member having a moving surface engaging the coated surface of the web, means for drivin said moving surface at a speed con- 15 sidera 1y lower than the surface speed of the web, and means for applyin a solvent of the coating to said surface 0 the member.

LYNN B. CASE.

CERTIFICATE or CORRECTlON.

Patent No. 1,873,821. August 23, 1932.

LYNN B. CASE.

It is hereby certified that the name of the assignee in the above numbered patent was erroneously described and specified as "John Walden Corporation." whereas said name should have been described and specified as John Waldron Corporation, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.-

Signed and sealed this let day ofNovember, A. D. 1932.

M. J. Moore,

(Seal) 1 Acting Commissioner of Patents.

.ing said roll at a much lower surface speed than the speed of the web, a trough su ported ad'acent to and extending longitu nally of t e roll, and having a longitudinal 5 aperture in its bottom, and a wick extending through said aperture and at its outer end engaging the roll.

i 4. In coatin apparatus, means for feeding a web to o coated and for applying a 1 coating thereto, and means for removing roughnesses from the coating comprising a member having a moving surface engaging the coated surface of the web, means for drivin said moving surface at a speed con- 15 sidera 1y lower than the surface speed of the web, and means for applyin a solvent of the coating to said surface 0 the member.

LYNN B. CASE.

CERTIFICATE or CORRECTlON.

Patent No. 1,873,821. August 23, 1932.

LYNN B. CASE.

It is hereby certified that the name of the assignee in the above numbered i patent was erroneously described and specified as "John Walden Corporation." whereas said name should have been described and specified as John Waldron Corporation, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.-

Signed and sealed this lst day of'November, A. D. 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

